Obtaining but-2-enes from C.sub.4 -hydrocarbon mixtures which contain but-1-ene and may or may not contain but-2-enes

US4777322A · kind A · utility

Assignee

• BASF SE

Inventors

• Wolfgang Hoelderich · Bischofswerda, DE
• Alfred Lindner · Frankenthal (Pfalz), DE
• Wolf D. Mross · Bischofswerda, DE
• Max Strohmeyer · Schifferstadt, DE
• Klaus Volkamer · Bischofswerda, DE

Key dates

• Filing date: Jul 26, 1985
• Grant date: Oct 11, 1988
• Expiry date: Jul 26, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C7/04
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

But-2-enes are obtained from C.sub.4 -hydrocarbon mixtures which contain but-1-ene and may or may not contain but-2-enes by catalytic isomerization of the but-1-ene to but-2-enes in an isomerization zone at elevated temperatures by a process in which the isomerization is carried out in combination with a distillative separation zone, the said hydrocarbon mixture being fed to the isomerization zone and/or distillative separation zone, the isomerization mixture obtained from the isomerization zone is passed into the distillative separation zone, a but-1-ene-containing fraction is removed above the lower third of the distillative separation zone and passed into the isomerization zone, and the but-2-enes or a fraction containing these are or is removed in the lower third of the distillative separation zone.